3. Results
Participants averaged 32 years of age, were mostly Caucasian
and smoked an average of 16 cigarettes per day (Table 1). During
the 1-hour ad libitum period, participants smoked an average of 3
cigarettes and took approximately 12 puffs from each cigarette. Treatment
groups (VAR vs. TNP) generally did not vary on demographic
and smoking characteristics, though TNP participants had longer puff
duration on the first cigarette smoked during the ad libitum period as
well as for all cigarettes and greater puff volume for all cigarettes compared
to VAR participants.
Initial and adjusted models determining risk ratios of smoking
versus abstinence, adjusted for treatment assignment, showed that all
topography measures were unassociated with smoking status at all
time points (Table 2). Given no significant associations and slightly
more intense topography in the TNP group (prior to randomization),
the modifying effects of treatment assignment were explored, though
this study was not sufficiently powered to detect modifying effects of
treatment. During the 4 weeks of active treatment, a significant association
was found between greater total puff volume on the first
cigarette (RR = 2.95 (1.49–5.82); p = 0.002) and all cigarettes smoked
(RR = 3.14 (1.05–9.39); p = 0.041) among participants randomized to
the TNP condition. This relationship was also demonstrated for longer
puff duration on the first cigarette (RR = 2.45 (1.14–5.27); p = 0.022)
and all cigarettes (RR = 2.70 (1.26–5.79); p = 0.011). Participants
who received VAR showed no significant associations between topography
measures and abstinence.
3. ResultsParticipants averaged 32 years of age, were mostly Caucasianand smoked an average of 16 cigarettes per day (Table 1). Duringthe 1-hour ad libitum period, participants smoked an average of 3cigarettes and took approximately 12 puffs from each cigarette. Treatmentgroups (VAR vs. TNP) generally did not vary on demographicand smoking characteristics, though TNP participants had longer puffduration on the first cigarette smoked during the ad libitum period aswell as for all cigarettes and greater puff volume for all cigarettes comparedto VAR participants.Initial and adjusted models determining risk ratios of smokingversus abstinence, adjusted for treatment assignment, showed that alltopography measures were unassociated with smoking status at alltime points (Table 2). Given no significant associations and slightlymore intense topography in the TNP group (prior to randomization),the modifying effects of treatment assignment were explored, thoughthis study was not sufficiently powered to detect modifying effects oftreatment. During the 4 weeks of active treatment, a significant associationwas found between greater total puff volume on the firstcigarette (RR = 2.95 (1.49–5.82); p = 0.002) and all cigarettes smoked(RR = 3.14 (1.05–9.39); p = 0.041) among participants randomized tothe TNP condition. This relationship was also demonstrated for longerpuff duration on the first cigarette (RR = 2.45 (1.14–5.27); p = 0.022)และบุหรี่ทั้งหมด (RR = 2.70 (1.26-5.79); p = 0.011) ผู้เข้าร่วมใครรับ VAR แสดงให้เห็นว่าไม่มีความสัมพันธ์ที่สำคัญระหว่างภูมิประเทศมาตรการและละเว้น
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